Core covering device



Feb. 20, 1951 E. G. EGGE CORE COVERING DEVICE Filed NOV. 19, 1949 amu zominu 00 o o o o o w n w w w nv Q 000 000 00 0 00 v 000.0 060 O 0000 0.0 06000 06 0 0 00 00 0 ooooo 00 I o w vo n o o $0 o oooo oo o ATTORNEY Patented Feb. 20, 1951 CORE COVERING DEVICE Edwin G. Egge, Central Falls, R. I., assignor to United States Rubber Company, New York, N. Y., a corporation of New Jersey Application November 19, 1949, Serial No. 128,370

3 Claims.

This invention relates to a core covering device of the type that has a hollow spindle which supports and rotates a yarn package about the core to be covered, and more particularly to a guiding cap at one end of the spindle and to means for clearing dirt or talc from the hollow spindle near this cap.

In my Patent No. 2,488,970 granted November 22, 1949, there'is disclosed and claimed a core covering device having a yarn guiding cap rotatably supported by antifriction means at the top of a hollow spindle that supports and rotates a package of core covering yarn. This spindle is made hollow so that the rubber thread or other core to be covered may pass freely therethrough,

and the size of the passage extending through the spindle is not important except near the upper end of the spindle where it serves as a guide to limit the lateral displacement of the core under the pull of the covering yarn being wound thereupon. For practical purposes a core receiving passage through the cap and spindle should be large enough to permit the free passage of the core therethrough and also large enough to receive a threading wire which is inserted through this passage to engage the core and pull it through the hollow spindle to thread up the apparatus.

The core covering device of said patent is' a highly desirable construction and enables the core covering operation to be performed at very high speed, but when the core being covered is a rubber thread having talc on its outer surface to render such surface smooth so that the thread is easier to handle, this talc tends to accumulate in the upper portion of the hollow spindle near the cap where the size of the passage in the cap is smaller than the bore of the hollow spindle. If such talc is permitted to accumulate in this area it will restrict the opening and interfere with the travel of the core therethrough.

The present invention resides in simple means for preventing dirt or talc from accumulating in the portion of the hollow spindle just mentioned. This is accomplished by providing the hollow spindle adjacent the point where its passage is reduced in size, with one or more laterally extending discharged ports arranged so that as the hollow spindle is rotated air and dirt or talc within the spindle bore will be thrown outwardly through such port or ports.

The above and other features of the present invention will be further understood from the following description vvwhen read in connection with the accompanying drawing, wherein:

'Fig. 1 is a side elevation of a core covering device constructed in accordance with the present invention;

Fig. 2 is a vertical sectional View through the core covering device of Fig. 1;

Fig. 3 on a larger scale is a vertical sectional view through the upper portion of. the hollow spindle and cap; and

Fig. 4 is a sectional view taken on the line 4-4 of Fig. 3.

The construction of the present invention is shown in the drawing as applied to a motor driven core covering spindle which, for the most part, may be similar to core covering spindles used heretofore. Only the upper end portion of the spindle driving motor 59 is shown in the drawing. This motor is adapted to support and rotate at high speed the hollow spindle l l which supports and rotates a yarn package 12. The yarn of this package may be wound upon the usual paper tube I3, which tube fits snugly upon an adapter having the hollow body M that may be made of wood. This body M is shown as having the head Hi against which the yarn Y may rest. The central portion of this body is provided with the bow springs 55 disposed apart around the tubular body to frictionally engage the inner bore of the tube 13. The hollow body M is notched at its lower end to engage the usual driving key It provided near the base of the rotating spindle H.

The spindle I l extends upwardly some distance beyond the upper end of the yarn package l2, and the upper end of this spindle is provided with a freely rotating top piece or cap ll adapted to guide the covering yarn Y from the package I2 to a core C passing upwardly through a core-receiving passage 18 formed in such cap. The cap i? may serve to tension the yarn Y in addition to guidingit to the core C. Therefore this cap may be provided with various types of yarn guides. Such guide as shown comprises an incline passage l9 through which the yarn Y passes, but other types of guides may be employed, adapted to tension the yarn Y as it is wound upon the core 0 to form the covered strand S.

The construction of the present invention was developed primarily for use in covering a fine rubber thread C by winding a fine strand of yarn about the core to produce a fine elastic yarn S, and under these conditions it is important that the cap H be supported from the hollow spindle H by an antifriction bearing so that it can rotate freely relatively to such spindle. In the construction shown the cap I! has extending downwardly therefrom the tubular member 20 that projects into a bearing housing 2| that serves to increase the height of the cap I! above the yarn package, and the cap is rotatably supported in this housing by a miniature ball bearing having the inner race 22 and outer race 23 between which lie the balls 24. The bearing housing 2| has a downwardly extending tubular portion 25 which fits tightly in the bore of the spindle II. This housing constitutes only on of a number of constructions that may be employed to rotatably support the cap H. The core-receiving passage !8 within the cap I! and tubular portion 28 of the cap is preferably smaller than .the bore of the hollow spindle H. This is desirable because the extent that the core C can be pulled laterally from its central path of travel by the tension of the yarn Y will be limited by the size of the core-receiving passage 18. Therefore this passage l8 should be only large enough to allow the core C to pass freely therethrough and also to receive a threading wire, not shown,jbut which is inserted through the cap and spindle when the apparatus is to be threaded up.

In working with rubber thread such as the core C it is customary to dust such thread with talc to reduce the tendency of the vulcanized thread to cling one coil to another in a package, but this talc has a tendency to become dislodged from the upwardly traveling core C adjacent the lower end of the tube 2% and tube .25, and gradually build up adjacent the ends of these tubes to form an objectionable restricting bank.

The present invention resides in a simple .and practical construction for preventing the formation of such banks from dirt or dust carried upwardly by the core 0. This is accomplished by providing such hollow spindlewith one or more outwardly extending ports disposed near the lower end of the tube 20 and tube 25. In the construction shown two ports 26 are provided adjacent the lower end of the tube Y20 and two ports 2'! are provided adjacent the lower end of .the tube 25. The ports 26, as will be apparent from Fig. 4, extend in opposite directions from the central bore of the spindle but these ports are offset somewhat from a radial line extending outwardly from the central axis of the spindle. This is because the ports throw the particles of dirt or talc out more effectively if these tubular ports are ofiset slightly as shown from the central axis of the spindle l l The lower ports 2] are preferably also oifset slightly the same .as are the ports 2.6.

The arrangement is such that when the spindle I l is rotated at high speed air will pass outwardly through these ports to discharge therethrough the objectionable dirt or talc D and in this manner the passage through the spindle and cap is kept free from dirt and talc without any special care on the part of the machine operator.

Having .thus described my invention what I claim and desire to protect by Letters Patent is:

1. A core covering device, comprising in combination a hollow spindle having means for rotating it and adapted to support a package of core covering yarn, .a guiding cap rotatably supported at the top of said spindle to turn independently of the spindle and having a central core-receiving passage and a yarn guide for guiding the core covering yarn supplied by the package to the core, and said spindle being provided near its upper end with a laterally extending discharge port disposed so that dirt within this portion of the hollow spindle will be thrown outwardly through the port by the rotation of the spindle.

2. A core covering device, comprising in combination a hollow spindle having means for rotating it and adapted to support a package of core covering yarn, a guiding cap rotatably supported at the top of said spindle to turn independently of the spindle and having a central core-receiving passage and a yarn guide for guiding the core covering yarn supplied by the package to the core, and the spindle having near its upper end outwardly extending discharge ports positioned so that dirt within this portion of the hollow spindle will be thrown outwardly through the ports as the spindle rotates.

3. A core covering device, comprising in combination a hollow spindle having means for rotating it and adapted to support a package of core covering yarn, a guiding cap rotatably supported at the upper end of the spindle to turn independently of the spindle and having a corereceiving passage smaller than the spindle passage andalso having a yarn guide for guiding the core covering yarn supplied by the package to the core, said spindle being provided near the inner end of said core-receiving passage with a laterally extending discharge port disposed so that dirt within this portion of the hollow spindle will be thrown outwardly through the port as the spindle rotates.

EDWIN G. EGGE.

No references cited. 

